package com.stylefeng.guns.core.config;

import java.math.BigInteger;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;

import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.ToStringSerializer;
import com.alibaba.fastjson.serializer.ValueFilter;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

/**
 * fastjson配置类
 *
 * @author fengshuonan
 * @date 2017-05-23 22:56
 */
@Configuration("defaultFastjsonConfig")
@ConditionalOnClass(com.alibaba.fastjson.JSON.class)
@ConditionalOnMissingBean(FastJsonHttpMessageConverter.class)
@ConditionalOnWebApplication
public class DefaultFastjsonConfig {

	@Bean
	public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
		FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
		converter.setFastJsonConfig(fastjsonConfig());
		converter.setSupportedMediaTypes(getSupportedMediaType());
		return converter;
	}

	/**
	 * fastjson的配置
	 */
	public FastJsonConfig fastjsonConfig() {
		FastJsonConfig fastJsonConfig = new FastJsonConfig();
		fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteEnumUsingToString);
		fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
		ValueFilter valueFilter = new ValueFilter() {
			public Object process(Object o, String s, Object o1) {
				if (null == o1) {
					o1 = "";
				}
				return o1;
			}
		};
		fastJsonConfig.setCharset(Charset.forName("utf-8"));
		fastJsonConfig.setSerializeFilters(valueFilter);

		// 解决Long转json精度丢失的问题
		SerializeConfig serializeConfig = SerializeConfig.globalInstance;
		serializeConfig.put(BigInteger.class, ToStringSerializer.instance);
		serializeConfig.put(Long.class, ToStringSerializer.instance);
		serializeConfig.put(Long.TYPE, ToStringSerializer.instance);
		fastJsonConfig.setSerializeConfig(serializeConfig);
		return fastJsonConfig;
	}

	/**
	 * 支持的mediaType类型
	 */
	public List<MediaType> getSupportedMediaType() {
		ArrayList<MediaType> mediaTypes = new ArrayList<>();
		mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
		return mediaTypes;
	}

}
